土-偏心结构相互作用平扭耦联反应参数分析  

Parameter analysis on the lateral-torsional coupling behavior of soil-asymmetric structure interaction system

作　　者：姜忻良[1] 霍毅[1] 臧姮 

机构地区：[1]天津大学建筑工程学院,天津300072

出　　处：《振动工程学报》2007年第6期652-657,共6页Journal of Vibration Engineering

基　　金：国家自然科学基金资助项目(50578110);博士点基金资助(20040056032)

摘　　要：建立了一种土-偏心结构相互作用简化模型,研究了考虑土-结构相互作用因素后结构平扭耦联反应。采用拉格朗日能量法推导了结构的运动方程,并结合算例,用振型分解法对结构的平扭耦联反应进行了分析,讨论了扭平频率比、偏心率和土-结构相互作用影响系数对结构平扭耦联反应的影响。计算结果表明,土-偏心结构相互作用体系与刚性地基上结构有明显差别,且随着地基土的变软,这些差别更为明显。A model for soil-asymmetric structure interaction system is established to study the lateral-torsional coupling response. The characteristic equation is given as the result of the application of the Langange energy equation, and lateral-torsional coupling response in practical structure is studied by modal analysis method. The effect of torsional-lateral frequency ratio, asymmetric ratio and soil-structure interaction affecting parameter on the lateral-torsional coupling response are dis- cussed. The results show that the difference betweena soil-asymmetric structure interaction system anda rigid base structure is evident. The softer the soil is, the more evident the difference is.

关 键 词：相互作用 拉格朗日能量法 平扭耦联 参数分析 偏心率 

分 类 号：P315.95[天文地球—地震学] TU352[天文地球—固体地球物理学]